Zoning · Mississauga · Residential
RM3 zone, Mississauga: RM3 (Semi-Detached On A CEC - Road)
Section 4.9.1, Table 4.9.1 of the City of Mississauga Zoning By-law 0225-2007, as amended by 0325-2008, 0379-2009, 0297-2013, 0190-2014, 0144-2016, 0174-2017, 0181-2018/LPAT Order 2019 February 15, 0018-2021, 0182-2024.
A residential zone for semi-detached houses that front onto a private condominium (CEC) road rather than a public street, with small lots and set rules for garages, parking and the shared road.
Is a property in the RM3 zone? Enter its address and the lookup returns the zone and these standards, including any site-specific exception.
Check an addressWhat the RM3 zone permits
- Semi-detached on a CEC - road
Standards
| Requirement | By-law |
|---|---|
| Minimum lot area (interior lot) | 160 m² |
| Minimum lot area (corner lot) | 230 m²CEC - corner lot: 230 m² (interior lot 160 m²) |
| Minimum lot width (interior lot) | 6.8 m |
| Minimum lot width (corner lot) | 9.8 mCEC - corner lot: 9.8 m (interior lot 6.8 m) |
| Minimum front yard | 4.5 m4.5 m for interior lot / CEC - corner lot; minimum setback from a garage face to a street, CEC - road or CEC - sidewalk is 6.0 m; see also Subsections 4.1.7 and 4.1.8 |
| Minimum interior side yard | 0.9 m0.0 m on the attached side; 0.9 m on the unattached side; 2.5 m where the interior side lot line is the rear lot line of an abutting parcel; see also Subsections 4.1.7 and 4.1.8 |
| Minimum exterior side yard | 4.5 m4.5 m where the exterior side lot line abuts a street or a CEC - road; 3.3 m where it abuts a CEC - sidewalk; minimum setback from a garage face to a street, CEC - road or CEC - sidewalk is 6.0 m; see also Subsections 4.1.7 and 4.1.8 |
| Minimum rear yard | 7.5 m7.5 m for interior lot / CEC - corner lot; see also Subsections 4.1.7 and 4.1.8 |
| Maximum building height | 10.7 m |
| Maximum lot coverage | 45 % |
Other provisions in this section
- Minimum setback from a garage face to a street, CEC - road or CEC - sidewalk: 6.0 m (Table 4.9.1 lines 6.2 and 7.4).
- Porch or deck (including stairs) at or below the first storey may encroach up to 1.5 m into the required front and exterior side yards (line 11.1; see 4.1.7 and 4.1.8).
- Awning, window, chimney, pilaster or corbel, window well, and stairs with a maximum of three risers may encroach up to 0.6 m into the required front and exterior side yards (line 11.2).
- Porch or deck (including stairs) at or below the first storey, or awning, may encroach up to 5.0 m into the required rear yard (line 11.3).
- For a semi-detached lot requiring a 0.0 m interior side yard, a porch or deck (including stairs) permitted in the rear yard may also have a 0.0 m setback to that interior side lot line (line 11.4).
- Balcony, window, chimney, pilaster or corbel, window well, and stairs with a maximum of three risers may encroach up to 1.0 m into the required rear yard (line 11.5).
- Minimum setback of a semi-detached to a CEC - visitor parking space: 3.3 m (line 11.6).
- Minimum setback of a semi-detached to a CEC - amenity area: 1.5 m (line 11.7).
- An attached garage is required and must comply with Table 4.1.12.1 - Garage Regulations (line 12.1; Subsection 4.1.12).
- Minimum parking spaces and minimum visitor parking spaces per Part 3 of the By-law; visitor parking also per Article 4.1.14.1 (lines 12.3-12.4).
- Maximum driveway width per Subsection 4.1.9 (line 12.5); a maximum of one driveway is permitted per lot (4.1.9.1.2).
- Minimum width of a CEC - road: 7.0 m; 6.0 m where an abutting parallel common visitor parking space exists (lines 13.1-13.2; see Article 4.1.14.2).
- CEC - roads and aisles may be shared with abutting lands having the same Base Zone and/or Exception Zone (line 13.3).
- Minimum width of a sidewalk: 2.0 m (line 13.4).
- Accessory buildings and structures are permitted in compliance with Table 4.1.2.2 (line 14.0; Subsection 4.1.2).
- Additional residential units: a maximum of two attached ARUs, or one attached ARU and one detached ARU, are permitted per lot subject to Subsection 4.1.1 and Table 4.1.1.1 (detached ARU per Table 4.1.1.14).
- Roof top external heating and/or air conditioning equipment are not permitted (4.1.6.2).
- All buildings and structures must also comply with Parts 1 to 3 and Section 4.1 of the By-law.
- Site-specific exception zones exist: RM3-1 to RM3-5 (Section 4.9.2; see Article 1.1.2.3).
Source: Section 4.9.1, Table 4.9.1, By-law 0225-2007 (City of Mississauga), checked 2026-09-12. General provisions elsewhere in the by-law (parking, driveways, accessory buildings) also apply, and a numbered exception on the parcel can change any value here. Treat this as a pre-check, not a sign-off.
Other residential zones in Mississauga: R12, R13, R14, R16, RA1, RA2, RA3, RA4, RA5, RA6, RA7, RL, RM10, RM11, RM12, RM4, RM5, RM6, RM8, RM9, RS